US1017350A - Reversing device for multicylinder internal-combustion engines. - Google Patents

Description

G. H W. URE N. V v BEVERSING DEVICE FOR M ULTIOYLINDER INTERNAL COMBUSTION ENGINES.

APPLICATION FILED AUG. 24, 1911. v

1,017,350, Patented Feb. 13, 1912.

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GUSTAV HEINRICH WILHELM UREN, OF AACI-IEN, GER-MANY, ASSIGNOR 'IO AACHE- N ER STAHLWAARENFABRIK FAFNIR-WER-KE AKTIENGESELLSCHAFT, OF AACHEN,

GERMANY.

Specification of Letters Patent.

Patented Feb. 13, 1912.

Application filed August 24, 1911. Serial No. 645,810.

T 0 aZZ whom it may concern:

Be it known that I, GUSTAV HEINRICH \VILHELM UREN, engineer, a subject of the King of Prussia, German Emperor, residing at Aachen, in the Kingdom of Prussia and German Empire, have invented certain new and useful Improvements in Reversing Devices for Multicylinder Internal-Combus tion Engines, of which the following is a specification.

My invention relates to multi-cylinder in ternal combustion engines and the object of my invention is to provide improved means for effecting reversal.

According to my invention, only a single fuel supply pipe is provided for each cylinder and, in connection therewith, only one fuel supply device and one actuating mem ber therefor. IVhen the engine is to be re versed, the actuating members for the fuel supply devices are shifted in such a way that some of the actuating menbers will act on the fuel supply devices of oppositely acting cylinders. After the reversal has been effected, all the actuating members are automatically returned to their initial positions.

Moreover, according to my invention, a larger amount of fuel is supplied to the cylinders, when the engine is reversed, whereby a richer mixture is produced, so that, even at a low degree of compression, the mixture is ignited with certainty during the compression stroke.

The drawing shows one of the cylinders of a fourcylinder engine and the fuel sup ply devices together with the operating devices therefor.

It is assumed that the cranks of the first and fourth cylinders are similarly disposed and those of the second and third cylinders set at an angle of 180 relatively to the former.

It is also assumed for the sake of simplicity that the invention is applied to a two-cycle motor. In this case the power strokes follow each other at intervals of 180 each and the first and fourth cylinders and the second and third cylinders operate simultaneously.

The fuel supply members a Z) 0 (Z belonging to the four cylinders respectively are operated in any convenient nammer c. g. by the cams e f g h, the cam 6 operating the fuel supply member a connected with the first cylinder, the cam f the fuel supply member 6 connected with the second cylinder, the cam g the fuel supply member 0 connected with the fourth cylinder and the cam 7b the fuel supply member (Z which is connected with the third cylinder. The cams are driven by a motor shaft and can be adjusted, for reversing purposes, in any convenient manner. In the constructions as shown a fork 2'. fixed to a slide bar 79 is employed.

The slide bar 70 is connected with a device of a known type which, after reversal has taken place, will return the operating devices of the fuel supply devices to their original positions.

In the drawing a link Z is shown which link is connected with a slotted lever m. The slot at is centrally pivoted at 'n, and is pivotally connected by a rod 0 with a bushing 9 'rotatably mounted upon the driving shaft 10. This bushing is split and is held together by spring pressure so that owing to slight frictional contact with the shaft it is driven by the latter. In order to limit the movements of lever m, two stops 1' and s are provided as shown. A rod 2? pivotally connects the link Z wit-h the hand lever o which is pivoted at u and serves for reversing the engine.

Reversal is effected in the following manner: By pulling the lever 12 to the right into the position marked Backwards the lower end of the link Z is moved upward in the slot of lever m and the rod 70 with the fork '5 and the camsc f g 72, are raised to such an extent that f and it now act upon the fuel supply members a and c of cylinders I and IV. Suitable devices can be interposed to prevent the cams f and h from operating the fuel supply members a and 0 until the speed of rotation has been suiiiciently reduced. As the cams f and h are arranged at an angle of 180 relatively to the cams e and 9, fuel is supplied to the cylinders I and IV the pistons of which are approximately at the lower dead center. Thus premature ignition is caused the pistons are driven back and thereby the engine is reversed. As soon as the crank shaft rotates in the opposite direction, however,,the bushing 39 is rotated in the same direction by the driving shaft 10 and the rod 0 and lever m are drawn downward against the stop 1". As lever m is connected by Z, 70 and i with the cams, the latter are returned to their initial positions and operate the fuel supply members in such a manner that fuel admission again takes places at the normal time. As a result the motor continues to rotate in the reversed direction.

In order again to cause the motor to run in a forward direction, the lever 01 is brought into the forward position after which the operation just described is repeated.

By a constructional modification either the fuel supply members or the operating cams can be so formed that during reversal a larger quantity of fuel is supplied to the operative cylinders. In the construction as shown the stroke ratios of the cams are different, the stroke of the cams f and 71 being greater than. that of the cams c and In forward and reversed running this eX-erts no influence upon the stroke of the fuel supply members as the effective stroke of the fuel supply members is calculated in sucl a manner as to deliver always equal quaiv tit ies of fuel. As soon. however, as the cams 7 and h are shifted so that they will operate the fuel supply members a and when reversing the difference of stroke exerted on these members will be noticed as a larger quantity of fuel will be supplied. The richer mixture thereby producedlargely assists in producing rotation in the reversed direction as a richer mixture can he ignited at alower compression and the backward stroke of the piston is effected with greater certainty.

The fuel supply members may be mount ed in any other relative positions and they may be ope ated by cams. or the like, directly or with the interposition of transmit ting gear such as levers or the like. The fuel supply device can also be constructed in such a manner that the fuel is injected into the cylinders with the use of compressed air or the like.

I claim:

1. Reversing mechanism for multi-cylinder internal combustion engines, comprising, in combination with the cylinders, fuel supply devices, one for each cylinder, an actuating member for each fuel supply device, and means for operatively connecting some of said actuating members with the fuel supply devices of oppositely acting cylinders for the purpose of reversing the engine.

Reversing mechanism for multi-cylinder internal combustion engines comprising, in combination with the cylinders. fuel supply devices, one for each cylinder, an actuating member for each fuel supply device, means for operatively connecting some of said actuating members with the fuel supply devices of oppositely acting cylinders for the purpose of reversing the engine, and means for auton'latically returning the actuating members to their initial positions.

3. Reversing mechanism for multi-cylinder internal combustion engines comprising, in combination with the cylinders, fuel supply devices. one for each cylinder, an actuating member for each fuel supply device and means for operatively connecting some of said actuating members with the fuel. supply devices of oppositely acting cylinders for the purpose of reversing the engine, said actuating members being so con structed as to supply an increased amount of fuel when the engine is reversed.

In testimony whereof I have aflixed my signature in presence of two witnesses.

GUSTAV HEINRICH WILHELM UltEN.

Vitnesses EDMUND JAnvLY, HENRY Cms. COLFXEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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